To ensure you have a lifetime of enjoyment with your spa, we start by choosing from a wide selection of high gloss, marbled and textured cast acrylics. This surface is tough and makes shell clean-up a breeze. Bonded by our specially formulated composite reinforcing process, Arctic Spas® are the strongest and most durable hulls in the industry. We incorporate multiple layers throughout the hull to increase structural integrity, which is one of the reasons we offer a Lifetime Structural Warranty on all of our spa hulls.